Alarm apparatus.



TF. P. MOYER. ALARM APPARATUS. APPLICATION FILED JAN; 22, I909.

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y w/rn/EssEs 0, Frank P;Moyer.

A TTORIV E Y Patented Dec. 14,1909.

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943,440. Application filed January 22, 1909. Serial No. 473,718.;

UNITED STATE s raTENT ()FFIQE.

ream: P. M ER, OF 'rrcA, NEW YORK.

ALARM APPARATUS.

To all whom "it may concern: v 1 Be it known thatLFnam; P. Moran, re-

siding at 'Utica, in the county of Oneida,

State of New Yo'rlg, have invented certain new; and useful Improvemerits in Alarm .r-Xpparatuspof' which the follow ng is' a specificatiom' i This invention relates to automatic alarms, and more particularly to apparatus adapted to sound analarm when .various unusual conditions obtain in the vicinity of theapparatus. i t

Oneof the objects ofthe invention is to provide a new and improved device which will be actuated by fire, smoke or other gases orwater.

Otherobjects will be in part'oln-ious and in part pointed out hereinafter.

-'1lheinvention accordingly consists in the features of construction, combinations of elements and arrangement ohparts, which will beexemplified in the construction hereinafter described, and the scope of'tbe application of which will be indicated in the following claims."

In the accompanying drawing wherein is shown one of the various possible embodiments iifmy' invention; Figure 1 is a vertical, sectioualview through the device, certaiu of' the parts being sho'wnin elevation,

is a frontelevation oftthe device.

Similar reference characters refer to simi- 'lar parts in both views of the drawing.

deferring now to the drawing, 1 denotes a cylindricalcasing provided with the ape rtures 2 and having its rear end llarcd, as shown, and n'ovided with suitable ears as at 4t b'y'means of which the device may be fastened to a wall orother support.

5 and 6 respectively, denote diaphragms which. extendacross cylinder-'1 and are fastened to the'inner wallsthereof, said diaphragms being spaced-as shown to provide a hermetically sealed chamber 17. Diaphragms 5 and 6 which are preferably corrugated are formed of zinc and are similarly dished,;,' as shown, the dished portions ex tending toward the rear of the casing, Diaphragmfi is provided with a't-"ntact point 8 which is groundedto the diaphragm, and diaphragm 5 is provided with a similar contact point 9 which is insulated therefrom. 'lhese contact points are arranged in op- Specification of Letters Patent -Pa.tented D60. 14:, 1909- connected with the binding posts It) and 1!,

and It indicates a device connected in the circuit. which is adapted to be actuated. said device, in the present instance, being an electric bell. It willbe observed that when the contact points are engaged the circuit will be closed and the alarm sounded Diaphragm has its outer surface coated or faced 'with a catalytic material, such 'material .in the presentinstance being platin'um blael ,-wl1ich material has the property of absorbing and condensing certain gases, such absorption or condensation being accompanicd by the production of heat. Ex-

tending downward from the upper portion.

of the casing is a curved apronor shield 13 which acts as a deflector for. the gases and directs them against the sensitized coating of the shield. This shield, moreover, pro: vides a temporary chamber for smoke or othergases whereby they are brought into intimate contact with the (ratalyticmaterialupon the diaphragm.

Aperturcs as at: 16 are formed in the apron 15, said apertures being of such size as will permit the smoke or other gases slowly to escape to the at,-

mosphere.

tlwivcled upon an arm 17 carried by bind- 'ing' post 10 is a lever 18, said lever being provided with a contact point 19 which co} operates with a contact point 20 formed upon'an arm 21 carried by the other binding post, such contact points, when engaged,

closing the circuit though the bindingposts. This lever is 'ada pted to swing by means of a, float 22 which normally rests in a cup 23 carried by the casing, saidfioat being connccted With the lever 18 as by means of a rod or link'24.

Having described the construction of this embodiment of my invention, the mannerof using the same; may now be understood. The device is 'n'eferably placed upon av wall or support in an upright'position, and if used in a building it will preferably be posed relation so that upon the distortion I placed near the ceiling. Should a iire occur the smoke generated thereby coming in contart with the sensitive coating of diaphragm 5 causes the. latter to eXpand owing to the absorption of the carbon-dioxid present in the smoke by the platinum black which constitutes the coating of the diaphragm. The expansion of the diaphragm Will of course engage the contact points and close the circuit. In the eveilt of leakage of water pipes or other contingencies whereby Water isreleased in the floor or apartment wherein the apparatus is located, Water entering cup will lift the float and close thecircuitnear the binding post, thus sounding the alarm. 7

it will accordingly be seen I have prorided an apparatus particularly 'well adapted to attain all the ends and objects above enumerated, in a simple yet eflicient manner.

The device is simple and compact and composed of relatively few parts. The provision of the apron insures an intimate contact between the diaphragm and the smoke or other gases and as soon as such smoke or other gases have leaked through the apertures of the apron the diaphragms will resume'their normal relative positions, thus opening the circuit. It will be obvious of coursethat the circuit may be caused to actuate any type of alarm apparatus or such other apparatus as might be instrumental in quenching a fire such as a sprinkling system.

As many changes could bemade in the above construction and many apparently widely difl'erent embodiments of this invention could be made without departing from the scope thereof, it intended that all matter contaii'ied in the above description or shown in the accompanying drawing shall be interpreted as illustrative and not in a limiting sense.

Having described my invention, What I claim asf neW and desire to secure by Letters Patent is: i

1. A device of the class described, comprising a casin having therein a chamber,

the opposed Wa ls of said chamber compris ing diaphragms, a coat-ingot catalytic substance applied exteriorly to one of said diaphragms, a shield carried by the casing-and covering a portion of said coated diaphragm and adapted to direct gases against the catadevice of the class described, com-Y ing coveringv a portion of said coated. dia -l.

phragm in such manner as to direct ases against the catalytic substance carrie b said diaphragm, said shield having smal perforations in the upper portion thereof and means cooperating with the diaphragms whereby an alarm mechanism is operated.

In testimony whereof I atlix my signature in the presence Oil/W0 witnesses.

FRANK P. Moran. Witnessesp 4 i JOSEPH A. OCONNOR, Pn'rnn K RL. 

